silas/imdd_silas
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Begin with High Speed Measurement

Browse Source
This commit is contained in:
Silas Labor Zizou
2024-10-23 09:32:10 +02:00
parent d6beff670c
commit b7975a96e9
6 changed files with 317 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
Classes/05_Lab/AwgKeysight.m
View File

@@ -237,7 +237,7 @@ classdef AwgKeysight
obj.writeNcheck(v,sprintf(':FREQuency:RASTer %.15g;', obj.fdac));
case awg_model.M8199B
obj.writeNcheck(v,':ABORt ''M2'''); %war auf M2, das wird wohl der CH sein oder?
obj.writeNcheck(v,':ABORt ''M2''');
obj.writeNcheck(v,sprintf(':FREQ ''M1.ClkGen'', %.15g;', obj.fdac));
end
@@ -301,6 +301,14 @@ classdef AwgKeysight
end
else
% If no signal defined, turn off channel
switch obj.model
case awg_model.M8199B
obj.writeNcheck(v, sprintf(':OUTP ''M2.DataOut%d'', OFF',chan));
end
end
end
@@ -313,8 +321,8 @@ classdef AwgKeysight
case awg_model.M8199B
% SET Ref clock out (which is conn. to scope) to 100 MHz
obj.writeNcheck(v, ':OUTPut:FREQuency ''M1.RefClkOut'',100000000');
% SET Ref clock out (which is conn. to scope) to 10 MHz
obj.writeNcheck(v, ':OUTPut:FREQuency ''M1.RefClkOut'',10000000');
% :OUTP:GLOB 'M1.System', OFF
obj.writeNcheck(v, ':OUTP:GLOB ''M1.System'', ON');

14
Classes/05_Lab/ScopeKeysight.m
View File

@@ -67,8 +67,8 @@ classdef ScopeKeysight
v=visadev('TCPIP0::keysight.tf.uni-kiel.de::inst0::INSTR');% TCPIP0::127.0.0.1::inst0::INSTR
case scope_model.UXR1102A
v=visadev('TCPIP0::testscope.tf.uni-kiel.de::inst0::INSTR');% TCPIP0::127.0.0.1::inst0::INSTR
case scope_model.UXR1104A
v=visadev('TCPIP0::134.245.243.223::inst0::INSTR');
case scope_model.UXR1104B
v=visadev('TCPIP0::134.245.243.239::inst0::INSTR');
end
else
try
@@ -79,7 +79,7 @@ classdef ScopeKeysight
end
end
debug = 0;
debug = 1;
if debug
disp(['Connected to Instrument: ',char(v.Vendor),' ',char(v.Model),' SerNo:',char(v.SerialNumber)]);
end
@@ -87,11 +87,11 @@ classdef ScopeKeysight
% Check if Scope is ready to go
opdone = 0;
acqdone = 0;
procdone = 0;
procdone = 1;
while ~opdone || ~acqdone || ~procdone
opdone = sscanf(obj.writeReceiveCheck(v,'*opc?'), '%f');
acqdone = sscanf(obj.writeReceiveCheck(v,'ader?'), '%f');
procdone = sscanf(obj.writeReceiveCheck(v,'pder?'), '%f');
%procdone = sscanf(obj.writeReceiveCheck(v,'pder?'), '%f');
pause(0.005);
end
armed = sscanf(obj.writeReceiveCheck(v,'aer?'), '%f');
@@ -111,7 +111,7 @@ classdef ScopeKeysight
end
else
obj.writeNcheck(v,':ACQuire:REDGe 0');
obj.writeNcheck(v,':ACQuire:SRATe %u',double(obj.fadc).*1e9);
obj.writeNcheck(v,sprintf(':ACQuire:SRATe %u',double(obj.fadc).*1e9));
end
%
@@ -133,7 +133,7 @@ classdef ScopeKeysight
switch obj.model
case scope_model.DSAZ634A
obj.writeNcheck(v,':TIMebase:REFClock HFR');
case scope_model.UXR1102A || scope_model.UXR1104A
case scope_model.UXR1102A || scope_model.UXR1104B
obj.writeNcheck(v,':TIMebase:REFClock 1');
end

2
Datatypes/scope_model.m
View File

@@ -3,7 +3,7 @@ classdef scope_model < int32
enumeration
DSAZ634A (1)
UXR1102A (2)
UXR1104A (3)
UXR1104B (3)
end
end

6
Tests/05_Lab/Scope_minmal_test.m Normal file
View File

@@ -0,0 +1,6 @@
SCP = ScopeKeysight("model","UXR1104B",'autoscale',0,"fadc","GSa_256","channel",[1,0],"recordLen",2000000,"removeDC",1);
scpe_sig_cell = SCP.read();

34
Tests/05_Lab/awg_minimal.m Normal file
View File

@@ -0,0 +1,34 @@
M = 4;
usemrds = 0;
fsym = 68e9;
fdac = 256e9;
awg_vpp = 0.1;
rrcalpha = 0.05;
%%%%% Construct AWG and Scope Modules %%%%%%
SCP = ScopeKeysight("model","UXR1104B",'autoscale',0,"fadc","GSa_256","channel",[0,0,0,1],"recordLen",2000000,"removeDC",1);
AWG = AwgKeysight("model","M8199B","fdac",fdac,"scaletodac",[1,1],"skews",[0,0],"voltages",[awg_vpp,0]);
A2S = Awg2Scope(AWG,SCP,[0,0,0,1]);
%%%%% Symbol Generation %%%%%%
Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rrcalpha);
[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",19,"useprbs",1,...
"fs_out",fdac,"applyclipping",0,"clipfactor",1.7,...
"applypulseform",0,"pulseformer",Pform,"randkey",pn_key,...
"db_precode",db_precode,...
"mrds_code",usemrds,"mrds_blocklength",512,"db_encode",db_coding_approach).process();
%%%%% Resample to DAC rate %%%%%%
Digi_sig = Digi_sig.resample("fs_out",AWG.fdac);
Digi_sig = Filter('filtdegree',5,"f_cutoff",1.1*(fsym/log2(M)),"fs",Digi_sig.fs,"filterType",filtertypes.gaussian).process(Digi_sig);
%%%%% AWG --> Scope %%%%%%
[Scpe_sig,~,~,~] = A2S.process("signal1",Digi_sig);
Scpe_sig.plot('displayname','Signal from Scope','fignum',10);
Scpe_sig.spectrum("displayname","Scope PSD","fignum",20);

258
projects/HighSpeedExperiment_2024/bias_optimization.m Normal file
View File

@@ -0,0 +1,258 @@
folderpath = 'C:\Users\sioe\Documents\High_Speed_Measurement_2024\bias_testing\';
experiment_name = 'PAM4_b2b_';
ffe_only = 0;
postfilter_approach = 1;
db_channel_approach = 0;
db_coding_approach = 0;
db_precode = db_coding_approach || db_channel_approach;
%%% SIR Sweep for MPI Experiment %%%
params = struct;
params.vbias = [3];
params.awg_vpp = [2.7];
wh = DataStorage(params);
wh.addStorage("ber");
wh.addStorage("pd_in");
wh.addStorage("rop");
wh.addStorage("m");
wh.addStorage("signals");
precomp_path = "C:\Users\sioe\Documents\High_Speed_Measurement_2024\precomp\";
precomp_fn = "lab_high_speed";
precomp_mode = 2; %0=do nothing ; 1= measure; 2=precomp active
precomp_amp_max = 4;
M = 4;
pn_key = 2;
usemrds = 0;
fsym = 170e9;
fdac = 256e9;
awg_vpp = 0.35;
fadc = 256e9;
rrcalpha = 0.05;
v_bias = 2.25;
pd_in_set = 6;
rop_atten = 0;
looptatal = prod(wh.dim);
disp(['Start Measurement of ',num2str(looptatal),' loops...'])
hWaitbar = waitbar(0, 'Starting measurement...', 'Name', 'Processing Progress');
loopcnt = 0;
for v_bias = wh.parameter.vbias.values
for awg_vpp = wh.parameter.awg_vpp.values
loopcnt = loopcnt+1;
progressFraction = loopcnt / looptatal;
waitbar(progressFraction, hWaitbar, ...
sprintf('Progress: %d/%d', loopcnt, looptatal));
loop_name = ['_fsym_',num2str(fsym)];
%%%%% SET Voltages %%%%%%
dcs = DC_supply("active",[1,0],"voltage",[v_bias, 0]);
dcs.set("voltage",[v_bias, 0]);
%%%%% SET Attenuator %%%%%%
voa = OptAtten("active",[1,2,1,1],"value",[rop_atten,pd_in_set,0,0],"wavelength",[1310,1310,1310,1310]);
voa.set('active',[1,2,1,1],'value',[rop_atten,pd_in_set,0,0]);
% voa.readvals();
%%%%% Construct AWG and Scope Modules %%%%%%
SCP = ScopeKeysight("model","UXR1104B",'autoscale',0,"fadc","GSa_256","channel",[0,1,0,0],"recordLen",2000000,"removeDC",1);
AWG = AwgKeysight("model","M8199B","fdac",fdac,"scaletodac",[1,1],"skews",[0,0],"voltages",[0,awg_vpp]);
A2S = Awg2Scope(AWG,SCP,[0,2,0,0]);
%%%%% Symbol Generation %%%%%%
Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rrcalpha);
[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",1,...
"fs_out",fdac,"applyclipping",0,"clipfactor",1.7,...
"applypulseform",0,"pulseformer",Pform,"randkey",pn_key,...
"db_precode",db_precode,...
"mrds_code",usemrds,"mrds_blocklength",512,"db_encode",db_coding_approach).process();
%%%%% Precompensation Routine %%%%%%
if precomp_mode == 1 % measure channel
precomp_est = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',fdac);
Digi_sig = precomp_est.buildOFDM();
elseif precomp_mode == 2 % apply precomp
precomp_est = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',Digi_sig.fs);
Digi_sig = precomp_est.precomp(Digi_sig,'maxampdb',precomp_amp_max,'loadPath',precomp_path,'fileName',precomp_fn);
end
%%%%% Resample to DAC rate %%%%%%
Digi_sig = Digi_sig.resample("fs_out",AWG.fdac);
%%%%% Plot and Save Routine 1 %%%%%%%%%%%%%%%%%%%%%%%%%
% Digi_sig.spectrum("displayname","Normal Tx","fignum",10);
% save([folderpath,[experiment_name,'bits'],loop_name],"Bits");
% save([folderpath,[experiment_name,'symbols'],loop_name],"Symbols");
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% AWG --> Scope %%%%%%
[~,Scpe_sig,~,D] = A2S.process("signal2",Digi_sig);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Scpe_sig.spectrum("displayname","Scope PSD","fignum",20);
% Scpe_sig.plot("displayname","Scope raw signal","fignum",25);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%% Sample to 2x fsym %%%%%%
Scpe_sig = Scpe_sig.resample("fs_in",fadc,"fs_out",2*fsym);
%%%%% Precompensation Routine %%%%%%
if precomp_mode == 1
precomp_est.estimate(Scpe_sig,"save",true,"savePath",precomp_path,"fileName",precomp_fn);
precomp_est.plot();
end
voa.readvals();
rop = voa.power_state(1);
pd_in = voa.power_state(2);
disp(['ROP: ',num2str(rop),' dBm || PD in: ',num2str(pd_in), ' dBm']);
%%%%%% Sync Rx signal with reference %%%%%%
[Scpe_sig,S] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);
%%%%%% SNR CHEAT - Avg. the measured signal occurences %%%%%%
average_signals = 0;
if average_signals
scope_mean = zeros(size(S{1}.signal));
for n=1:numel(S)
scope_mean = scope_mean + S{n}.signal;
end
scope_mean = scope_mean ./ n;
Scpe_sig.signal = scope_mean;
end
%%%%% Plot and Save Routine 2 %%%%%%%%%%%%%%%%%%%%%%%%%
save([folderpath,experiment_name,'rx_signal',loop_name],"S");
Scpe_sig.eye(fsym,M,"fignum",40,"displayname",' after Scope');
voa.readvals();
rop = voa.power_state(1);
pd_in = voa.power_state(2);
%%%%% EQUALIZE %%%%%%
Eq = FFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",50,"sps",2,"decide",0);
% Eq = VNLE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",[0.0004 0.0005 0.0006],"mu_tr",0,"order",[50,7,7],"sps",2,"decide",1);
% Eq = EQ("Ne",[50,7,7],"Nb",[0,0,0],"training_length",4096*2,"training_loops",5,"dd_loops",5,"K",2,"DCmu",0.05,"DDmu",[0.0004 0.0004 0.0004 0.0004 ],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
if ffe_only %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
EQ_sig.plot("fignum",50,"displayname",'After EQ');
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['FFE: ',sprintf('%.1E',ber),'| ROP: ',num2str(rop),' dB | PD_in: ',num2str(pd_in),' dBm']);
if 1
figure(53);
constellation = unique(Symbols.signal);
received = NaN(numel(constellation),length(Symbols));
for lvl = 1:numel(constellation)
received(lvl,Symbols.signal==constellation(lvl)) = EQ_sig.signal(Symbols.signal==constellation(lvl));
hold on
histogram(received(lvl,:),1000,"EdgeAlpha",0);
end
end
elseif postfilter_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);
Noi = EQ_sig-Symbols;
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber_ffe_only,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
nc = 3;
burg_coeff = arburg(Noi.signal,nc);
EQ_sig = EQ_sig.filter(burg_coeff,1);
if 0
Noi.spectrum('displayname','Noise PSD','fignum',123)
[h,w] = freqz(1,burg_coeff,length(Noi),"whole",Noi.fs);
h = h/max(abs(h));
hold on
w_ = (w - Noi.fs/2);
plot(w_.*1e-9,20*log10(fftshift(h)),'DisplayName',['', num2str(nc), ' coefficients for burg alg.']);
end
EQ_sig = MLSE("DIR",burg_coeff,"duobinary_output",0,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['FFE: ',sprintf('%.1E',ber_ffe_only),' -> PF -> MLSE: ',sprintf('%.1E',ber),' dB | PD_in: ',num2str(pd_in),' dBm']);
elseif db_channel_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig, Noi] = Eq.process(Scpe_sig,Duobinary().encode(Symbols));
EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);
EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
EQ_sig = Duobinary().decode(EQ_sig);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp([' DB Precode -> Channel -> FFE -> Decode/ Mod ',sprintf('%.1E',ber),' | PD_in: ',num2str(pd_in),' dBm']);
elseif db_coding_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig, Noi] = Eq.process(Scpe_sig,Symbols);
EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
EQ_sig = Duobinary().decode(EQ_sig);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
EQ_sig.plot("fignum",50,"displayname",'After EQ');
disp([' DB Precode -> DB Code -> Channel -> FFE -> Decode/ Mod ',sprintf('%.1E',ber),' | PD_in: ',num2str(pd_in),' dBm']);
end
wh.addValueToStorage(ber,'ber',v_bias,awg_vpp);
wh.addValueToStorage(rop,'rop',v_bias,awg_vpp);
wh.addValueToStorage(pd_in,'pd_in',v_bias,awg_vpp);
wh.addValueToStorage(Rx_bits,'signals',v_bias,awg_vpp);
wh.addValueToStorage(M,'m',v_bias,awg_vpp);
showCurrentMeasurement('BER', ber, 'ROP', rop, 'PD in', pd_in, 'PAM',M, 'Vbias', v_bias, 'AWG Vpp', awg_vpp, 'Precomp MaxAmp',precomp_amp_max);
autoArrangeFigures(3,3,2);
end
end
close(hWaitbar);
wh.save([folderpath,experiment_name,'_wh']);
autoArrangeFigures(3,3,2)